Move av_int2i()'s unaltered comments to the header file.

Originally committed as revision 8230 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/integer.c

@@ -140,9 +140,6 @@ AVInteger av_div_i(AVInteger a, AVInteger b){
     return quot;
 }
 
-/**
- * converts the given int64_t to an AVInteger.
- */
 AVInteger av_int2i(int64_t a){
     AVInteger out;
     int i;

libavutil/integer.h

@@ -61,6 +61,10 @@ AVInteger av_mod_i(AVInteger *quot, AVInteger a, AVInteger b);
  * returns a/b.
  */
 AVInteger av_div_i(AVInteger a, AVInteger b);
+
+/**
+ * converts the given int64_t to an AVInteger.
+ */
 AVInteger av_int2i(int64_t a);
 int64_t av_i2int(AVInteger a);